51332031 has 6 divisors (see below), whose sum is σ = 74146280. Its totient is φ = 34221348.

The previous prime is 51332023. The next prime is 51332069. The reversal of 51332031 is 13023315.

It is not a de Polignac number, because 51332031 - 2³ = 51332023 is a prime.

It is a super-2 number, since 2×51332031² = 5269954813169922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51331995 and 51332013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51332081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2851771 + ... + 2851788.

Almost surely, 2^51332031 is an apocalyptic number.

51332031 is a deficient number, since it is larger than the sum of its proper divisors (22814249).

51332031 is a wasteful number, since it uses less digits than its factorization.

51332031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5703565 (or 5703562 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 51332031 is about 7164.6375344465. The cubic root of 51332031 is about 371.6460168927.

Adding to 51332031 its reverse (13023315), we get a palindrome (64355346).

The spelling of 51332031 in words is "fifty-one million, three hundred thirty-two thousand, thirty-one".